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Exploited vulnerability · CISA KEV

Is CVE-2020-11899 exploited? Yes: in CISA KEV since 3 Mar 2022

Gociux · Treck TCP/IP stack IPv6 · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-11899, Treck TCP/IP stack Out-of-Bounds Read Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, 624 days after it was published. It affects Treck TCP/IP stack IPv6. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity5.4CVSS 3.1 · medium
US federal due17 Mar 2022BOD 22-01 deadline

What it is

The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

VendorTreck TCP/IP stack (1 exploited CVE in KEV)
ProductIPv6
VulnerabilityTreck TCP/IP stack Out-of-Bounds Read Vulnerability
WeaknessCWE-125
Published17 Jun 2020
Added to KEV3 Mar 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for IPv6 in your asset inventory, including appliances and cloud images. Stack check lists every exploited Treck TCP/IP stack CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 17 Jun 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Treck TCP/IP stack.

References

Questions

Is CVE-2020-11899 being exploited?

Yes. CISA added CVE-2020-11899 to the Known Exploited Vulnerabilities catalog on 3 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-11899 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-11899?

Apply updates per vendor instructions. Check Treck TCP/IP stack's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected IPv6 and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · act-now radar.

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